Home / 3,970.74-5,479.98-2,202.70

Finding the Fourth Proportional to 3,970.74, 5,479.98 and 2,202.70

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Solution

The fourth proportional to 3,970.74, 5,479.98 and 2,202.70 is: 3,039.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.74 : 5,479.98 = 2,202.70 : x
  2. Step 2: Convert to fraction form
    3,970.74/5,479.98 = 2,202.70/x
  3. Step 3: Cross multiply
    3,970.74x = 5,479.98 × 2,202.70
  4. Step 4: Simplify right side
    3,970.74x = 12,070,751.95
  5. Step 5: Solve for x
    x = 12,070,751.95/3,970.74
  6. Step 6: Final answer
    x = 3,039.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.